StudioComm Dante 792 Bedienungsanleitung

50396-0123, Issue 2

studio-tech.com

User Guide

Issue 2, January 2023

This User Guide is applicable for systems consisting of:

Model 792: serial numbers M792-00151 and later with application rmware 3.00 and later;

Model 793: serial numbers M793-00151 and later with application rmware 1.04 and later

Model 792 Central Controller and

Model 793 Control Console

with Dante®Support

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Model 792/793 User Guide Issue 2, January 2023

Studio Technologies, Inc. Page 3

Model 792 & Model 793

StudioComm with Dante Support

Table of Contents

Revision History................................................................................................................. 4

Introduction........................................................................................................................ 5

Installation ......................................................................................................................... 9

Dante Conguration........................................................................................................... 15

Model 792 and Model 793 Conguration........................................................................... 17

Operation........................................................................................................................... 42

Technical Notes ................................................................................................................. 46

Specications .................................................................................................................... 51

Appendix A—Connection Pin-Out Charts.......................................................................... 53

Appendix B—Network Conguration Examples ................................................................ 54

Appendix C—Default Dante Channel Names.................................................................... 56

Appendix D—Factory Default Values ................................................................................ 57

Appendix E—Model 792 Control Using HTTP................................................................... 58

Issue 2, January 2023 Model 792/793 User Guide

Page 4 Studio Technologies, Inc.

Model 792 & Model 793

StudioComm with Dante Support

Revision History

Issue 2, January 2023:

• Documents removal of DNS address from Conguration menus.

• Miscellaneous corrections and clarications.

Issue 1, February 2021:

•Initial release.

Model 792/793 User Guide Issue 2, January 2023

Studio Technologies, Inc. Page 5

Model 792 & Model 793

StudioComm with Dante Support

Introduction

Dante

digital audio has found wide acceptance in

all aspects of audio, from live entertainment and

broadcast events, to corporate, recording, and post-

production facilities. While certainly a legacy technolo-

gy, analog audio signals have maintained an important

place in the world of professional audio. And the days

of needing to support only 2-channel stereo and 5.1

or 7.1 surround formats have ended. The variety of

surround formats, and their associated channel counts

and arrangements, has expanded the need for spe-

cialized equipment. The ability to monitor these Dante

digital and analog audio sources in a convenient and

sonically excellent way has become a requirement

for many applications. Studio Technologies has

addressed these needs with the StudioComm with

Dante Support system consisting of the Model 792

Central Controller and the Model 793 Control Console.

Rather than supporting a specic surround format,

the StudioComm with Dante Support system incor-

porates an internal 16-channel architecture. This

allows a range of surround audio applications to be

easily supported. With Dante digital and analog audio

inputs, Dante digital and analog monitor outputs, and

an extensive set of operating resources it’s a simple

task to integrate a monitoring system into virtually any

contemporary facility. The carefully selected group

of features, including both 16-channel surround and

2-channel stereo inputs, configurable input-signal

time delays, multiple pre- and post-fader outputs, and

mute/solo functions make the system powerful yet

simple to operate. And by using the best of contempo-

rary technology, as well as following rigorous design

practices, the system’s audio quality is excellent.

A StudioComm with Dante Support system starts

with the Model 793 Control Console. It’s the sys-

tem’s “command center” and is designed to reside at

a user’s location, allowing ngertip selection of all

monitoring functions. Numerous LED indicators

provide complete status information. A backlit OLED

display indicates key operating and configuration

parameters. The second part of the StudioComm

system is the Model 792 Central Controller. This

one-rack-space unit contains all the circuitry required

to support the Dante digital and analog audio input

and output signals. It links with the Model 793 using

a 9-conductor D-subminiature cable. An integral web

server allows fast and exible conguration of the

unit’s networking, audio, and Dante performance. This

allows the system’s performance to be optimized to

meet the needs of many specic applications.

Dante audio resources include both surround and

stereo inputs and outputs. The Dante surround

input and output functions consist of 16 independent

channels while the stereo input and output functions

support two channels. The Dante channels are

Figure 1. Model 792 Central Controller front view

Status LEDs

AC Mains

Input

Figure 2. Model 792 Central Controller back view

3.5 mm

Jack

Input

Analog

Surround

Outputs

Analog

Surround

Inputs

To/From

Control

Consoles

Ethernet

Ports

USB

Port

Level

Control

Signal

Present

LEDs

Issue 2, January 2023 Model 792/793 User Guide

Page 6 Studio Technologies, Inc.

Model 792 & Model 793

StudioComm with Dante Support

compatible with AES67 and support Dante’s ST 2110

implementation. Analog audio resources include a

16-channel surround input, a 2-channel stereo input,

and a 16-channel surround output.

Great care was taken in designing the system’s cir-

cuitry, ensuring that the character of the Dante digital

and analog audio input signals is preserved. All audio

processing is performed in 32-bit logic using a high-

speed eld-programmable-gate-array (FPGA) inte-

grated circuit. The performance of the analog-to-digital

and digital-to-analog functions will meet or exceed

virtually any professional audio product. The sonic

performance of the StudioComm system is completely

“pro” with no compromises.

The Model 792 Central Controller occupies one space

(1U) in a standard 19-inch rack. Dante digital audio

sources are interfaced using one or two gigabit (GigE)

Ethernet network connections that use RJ45 connec-

tors. This arrangement allows switched or redundant

Dante operation. A third gigabit network connection

provides an independent means of accessing the

Model 792’s conguration webpages. This ensures

that facilities can support separate audio and main-

tenance networks. Standard connectors on the Model

792 allow simple interfacing with Dante digital audio,

analog audio, control console, and power connec-

tions. AC mains power is connected directly to the

Model 792, with an acceptable range of 100 to 240 V,

50/60 Hz. A source of nominal 12 volts DC can also be

connected. If both power sources are connected the

AC mains source will provide operating power while

the DC source serves as a “hot standby.”

Two Surround and Two Stereo

Inputs

The Model 792 allows connection of one Dante digital

surround and one analog surround signal source.

Each surround input allows up to 16 independent

channels to be supported with no dened format. This

provides exibility for installations that utilize formats

such as 7.1, 7.1.2, 7.1.4, 10.2, 11.1, 11.1.4, etc. Each

of the 16 channels associated with a surround input

is full-delity and, as such, is appropriate to use as

a main, surround, back, side, ceiling, or low-frequency

enhancement channel. This exibility allows the Model

792 to be utilized in a variety of applications, including

experimental or test formats.

Support for two 2-channel stereo inputs is also provid-

ed. A Dante stereo input allows two channels of Dante

audio to be selected for monitoring. An unbalanced

analog input, located on the Model 792’s front panel,

allows the output of a “semi-pro” personal audio de-

vice to be directly connected.

The audio performance of the Model 792’s analog

inputs is very good. Low-noise, wide dynamic-range

circuitry ensures that the audio quality is preserved.

The analog audio signals are routed to high-perfor-

mance analog-to-digital conversion (ADC) circuitry

that supports a bit depth of 24 and sample rates of

44.1, 48, and 96 kHz. A precision voltage-reference

circuit helps the ADC circuitry perform highly accurate

signal conversion. The audio signals, now in the digital

domain, are routed to a high-speed programmable

logic (FPGA) device where they are mixed and level-

controlled as necessary.

Each of the four inputs, two surround and two stereo,

can have a unique name assigned to it. This can be

helpful when a Model 793 Control Console user is se-

lecting which input to monitor. In addition, a time delay

can be applied to each input, useful for compensating

for video processing or display “latency.” Delays of

up to 999 milliseconds, as related to a sample rate

of 48 kHz, can be applied. Each input channel, 36 in

total, can be level “trimmed” over a ±20 dB range in

steps of 0.1 dB.

Figure 3. Model 793 Control Console front view

Model 792/793 User Guide Issue 2, January 2023

Studio Technologies, Inc. Page 7

Model 792 & Model 793

StudioComm with Dante Support

Analog Surround Input

The Model 792 provides 16 independent analog

input channels which are compatible with balanced

or unbalanced line-level sources. These inputs have

a nominal level of +4 dBu and are electronically

balanced (di󰀨erential), capacitor-coupled, and ESD

(static) protected for reliable operation in demanding

applications. Extensive ltering minimizes the chance

that radio frequency (RF) energy will cause interfer-

ence. The analog inputs are protected from dam-

age should a moderate DC voltage be accidentally

connected. These characteristics make the analog

inputs suitable for use in studio and mobile facility

environments. The analog input signals are convert-

ed to 24-bit digital and then utilized by the internal

logic circuitry. Compatible signal sources include

audio consoles, broadcast playback equipment, and

analog output ports on routers and networked audio

equipment.

Dante Surround Input

The Model 792 provides a 16-channel “wide” Dante

input for direct interfacing with applications that utilize

Dante technology. As with the Analog Surround Input,

the format of the 16 input channels is not dened.

Signals with a bit depth of up to 24 and sample rate

of 44.1, 48, or 96 kHz are compatible. The Dante

surround input channels have a nominal signal level

of –20 dBFS.

Analog Stereo Input

A 3-conductor 3.5 mm jack is located on the Model

792’s front panel and allows direct interconnection

with the output of a personal audio device. The input

circuitry is optimized for use with “semi-pro” equip-

ment that has a nominal level of –10 dBu. A rotary

level control and two signal-present LEDs enable a

user to easily optimize the sensitivity of the input cir-

cuitry, matching its performance to the nominal level

of the connected source. A high-performance ADC

circuit converts the analog signal to 24-bit digital.

Dante Stereo Input

The Model 792 provides two Dante digital audio input

channels for interfacing with a stereo source. As with

the Dante Surround Input, the Dante Stereo Input

has a nominal level of –20 dBFS, a bit depth of up to

24, and sample rate support of 44.1, 48, and 96 kHz.

Three Monitor Outputs

The StudioComm with Dante Support system pro-

vides three monitor outputs: one 16-channel Dante

digital, one 16-channel analog, and one 2-channel

stereo Dante digital. Conguration choices allow the

characteristics of the three outputs to be optimized

to meet the requirements of specific applications.

For exibility, a conguration menu choice allows the

level of each analog output channel to be individu-

ally adjusted (“trimmed”) over a range of ±20 dB in

0.1 dB steps.

Analog Output

The Analog Surround Output is 16 channels “wide”

and can be selected for pre- or post-fader (before

or after the level control) operation. These analog

output channels are intended for connection to inputs

on audio ampliers or powered loudspeakers associ-

ated with a monitor loudspeaker system. Power-up/

power-down muting relays help to protect the loud-

speaker system from unwanted transient signals.

The analog surround output channels have a nominal

level of +4 dBu and are electronically balanced, capac-

itor-coupled, and ESD (static) protected. High-quality

components, including the critical digital-to-analog

converters, are used to provide low-distortion, low-

noise, and sonically excellent performance. Robust

circuitry provides protection from damage should

a moderate DC voltage be accidentally connected,

something especially useful in broadcast applications.

The analog outputs are compatible with virtually all

balanced and unbalanced loads with an impedance

of 2 k ohms or greater.

The Model 792’s analog output channels have a max-

imum level of +24 dBu. This allows both compatibility

and signicant headroom in applications where digital

audio input signals with a nominal level of –20 dBFS

need to be converted into analog signals that have a

nominal level of +4 dBu.

Dante Surround and Stereo Outputs

The Model 792 provides two Dante monitor outputs.

One is 16 channels and the other is 2-channel ste-

reo. Each is selectable to be either pre- or post-fader

and can be routed (Dante subscribed) to inputs on

compatible monitor loudspeakers. They can also be

utilized for level metering or other general-purpose

uses, typically configured for pre-fader operation.

Issue 2, January 2023 Model 792/793 User Guide

Page 8 Studio Technologies, Inc.

Model 792 & Model 793

StudioComm with Dante Support

The nominal level of the Dante monitor outputs is

–20 dBFS. Each Dante output channel can have its

level individually adjusted (“trimmed”) over a range of

±20 dB with a step size of 0.1 dB.

Dante Performance

Two of the Model 792’s three gigabit Ethernet ports

are utilized by the Dante audio interfaces. These ports

can be selected, using the Dante Controller software

application, for switched or redundant Dante opera-

tion. Support is provided for both AES67 and Dante

Domain Manager™ (DDM) operation. The Model 792

will also support Dante’s ST 2110 implementation.

The StudioComm with Dante Support system allows

the Dante audio sample rate to be selected for 44.1,

48, or 96 kHz with a bit depth of 24. The Dante Con-

troller software application is used to route (subscribe)

the Model 792’s receiver (input) and transmitter

(output) channels with the associated Dante compli-

ant-equipment.

Operation

The Model 793 Control Console provides the operator

with an easy-to-use interface and includes a set of

pushbutton switches, a rotary control, and a backlit

OLED graphics display. Together these resources are

used to select the desired monitoring environment.

User functions include selecting the input source,

adjusting the listening level, selecting the monitor

output, and activating other special features. The

four audio inputs, two 16-channel surround and two

2-channel stereo, can be individually selected for

monitoring. Although only one is typically selected to

be monitored at any one time, for exibility two, three,

or all four can be combined (summed) and monitored.

The rotary control (actually an encoder with 30 steps

per rotation) allows adjustment of the monitor output

level in 0.5-dB steps.

For content conrmation, each of the unit’s sixteen

channels can be individually muted or soloed as de-

sired. Multiple channels can also be simultaneously

muted or soloed and needed. A reference level value

can be saved and then enabled by the operator, al-

lowing the monitor output level to be directly returned

to a known value. A mute all function simultaneously

mutes all sixteen output channels. The dim feature al-

lows the operator to attenuate the monitor output level

from among four congurable values. The graphics

display will show a variety of system-related infor-

mation. This includes the text names that have been

assigned to the input sources and output destinations.

The display will also show the current monitor output

level directly in dB. Pressing the rotary control’s knob

will cause the management port’s IP address to show,

helpful when conguring the StudioComm with Dante

Support system.

LED indicators are provided on both the front and back

panels of the Model 792. These relate to selected

performance characteristics of the Ethernet interfaces,

Dante interface, general system activity, and levels of

the unbalanced stereo audio input. They can be useful

during installation, troubleshooting, and operation of

the StudioComm system.

Special applications can take advantage of the Model

792 Central Controller’s ability to be controlled using

an API running under an operating system on ex-

ternal computer hardware. Using HTTP, in the form

of sending GET or POST HTTP requests, all Model

793 Control Console user control functions can be

duplicated using a software-based application. These

HTTP requests will interface with the Model 792 by

way of the management Ethernet interface.

Simple Installation

The Model 792 Central Controller uses standard con-

nectors to allow fast and convenient interconnections.

Gigabit Ethernet connections are made to local area

network (LAN) ports using three RJ45 connectors, two

for Dante and one for management. Multiple LEDs on

the unit’s back panel display the status of the network

connections. Four 25-pin female D-subminiature

connectors are used to interface with the unit’s 16

channels of analog surround input and 16 channels

of analog monitor output. A 3-conductor 3.5 mm

jack, located on the Model 792’s front panel, allows

connection of a source of unbalanced stereo audio.

A detachable power cord is used to connect the

Model 792 to a source of AC mains power. A DC

power source can be connected using a 4-pin XLR

connector. The lightweight aluminum enclosure

mounts in one space (1U) of a standard 19-inch rack

enclosure. An interconnecting cable with 9-pin male

D-subminiature plugs on each end are used to inter-

connect the Model 792 Central Controller with the

Model 793 Control Console. An interface cord with an

Model 792/793 User Guide Issue 2, January 2023

Studio Technologies, Inc. Page 9

Model 792 & Model 793

StudioComm with Dante Support

approximate length of 20 feet (7.3 meters) is includ-

ed with each StudioComm system. The standalone

Model 793 Control Console is typically placed on a

surface that allows easy operator access.

AC and DC Power

The Model 792 allows an AC mains source of 100-

240 V, 50/60 Hz to be connected by way of a de-

tachable power cord. The unit can also be powered

using a 12 volts DC source that is connected via a

broadcast-standard 4-pin XLR connector. If both the

AC and DC power sources are connected the Model

792 will be powered by the AC mains supply. Only if

the AC mains source fails will a load be placed on the

DC source. The Model 792 Central Controller provides

a current-limited source of 12 volts DC power for use

by the Model 793 Control Console.

Future Capabilities and Firmware

Updating

Both the Model 792 and Model 793 were designed

so that their capabilities can be easily enhanced in

the future. A USB connector, located on the Model

792’s back panel, allows its main and FPGA rmware

(embedded software) to be updated using a USB

ash drive. The Model 792 uses Audinate’s Brook-

lyn module to implement its Dante connectivity. The

rmware in this module can be updated via the unit’s

Ethernet connections, helping to ensure that the

Dante capabilities remain up to date. The Model 793

also utilizes a USB connector, located inside the unit,

to allow its main rmware to be updated. All rmware

les and conguration parameters are securely stored

in non-volatile memory.

Installation

In this section, the Model 792 Central Controller will

be mounted in one space (1U) of an equipment rack.

Ethernet data connections will be made. Some appli-

cations will require analog audio input and/or output

signals be interconnected. A location will be selected

for the Model 793 Control Console and it will be inter-

connected with the Model 792. AC mains and/or DC

power will be connected to the Model 792.

Up to three Gigabit Ethernet data connections will be

made to the Model 792 using standard RJ45 patch

cables. Connections can be made to the Analog

Surround Output using two 25-pin D-subminiature

connectors. If needed for the application, line-level

Analog Surround Input connections will be made using

two additional 25-pin D-subminiature connectors. A

3-conductor 3.5 mm jack, located on the front panel,

is provided for interconnection with a source of ste-

reo analog audio. It will typically remain available for

temporary use by a personal audio device, however

a permanent connection can be made.

AC mains power can be connected to the Model 792

by means of a detachable cord set that is compatible

with the unit’s 3-pin IEC 320 C14 inlet connector.

Some applications may warrant connection to a

source of nominal 12 volts DC which can be made

by way of a 4-pin XLR connector. The DC source can

be used to power the Model 792 or it can serve as a

backup power source should AC mains be connected.

What’s Included

The shipping carton contains one each of the follow-

ing: Model 792 Central Controller, Model 793 Control

Console, 9-pin D-subminiature interconnecting cable

(approximately 20 feet (6 meters) in length), and

instructions on how to obtain an electronic copy of

this guide. Also included in the shipping carton is a

North-American-standard AC mains cord. For desti-

nations outside of North America the local reseller or

distributor should provide an appropriate AC mains

cord.

Mounting the Model 792

The Model 792 Central Controller requires one space

(1U) in a standard 19-inch (48.3 cm) equipment rack.

Secure the Model 792 into the equipment rack using

two mounting screws per side. As the Model 792 does

not contain a fan or other noise-producing source it

can be located within a room or other structure where

audio monitoring is going to take place. Select a loca-

tion that is convenient for making connections to the

Ethernet interfaces, analog audio outputs and inputs,

and interfacing with the Model 793 Control Console.

Twisted-pair (UTC) Ethernet has a 100-meter (325-

foot) interconnection cable limitation. But that can

be overcome by using a ber-optic interconnection

between the Model 792 and the Ethernet switch or

switches in the one or more associated local-area-

networks (LANs). A 3-conductor (stereo) 3.5 mm

jack is located on the Model 792’s front panel. This

allows direct connection of an analog source provided

by a personal audio device. Selecting a location for

Issue 2, January 2023 Model 792/793 User Guide

Page 10 Studio Technologies, Inc.

Model 792 & Model 793

StudioComm with Dante Support

the Model 792 that allows ready access to this jack

can be helpful in some applications. A cable is sup-

plied for interconnecting the Model 792 with the Model

793. If the needs of a specific installation dictate,

an alternate-length interconnecting cable can be

fabricated and used.

Ethernet Connections

The Model 792 provides three Gigabit (GigE) Ethernet

ports for exibility and compatibility with many net-

working implementations. Two ports are provided for

interconnections with one or two local area networks

(LAN) associated with Dante audio-over-Ethernet net-

working schemes. They are labeled as PRI (primary)

and SEC (secondary). Using the Dante Controller ap-

plication these ports can be congured for Switched or

Redundant Dante operation. The third Ethernet port,

labeled MGMT, is dedicated to accessing the Model

792’s management resources. An internal web server

function supports the Model 792’s management port’s

webpages. These webpages are used for congura-

tion, monitoring, and maintenance of Model 792 and

Model 793 operation.

By providing three Ethernet ports the Model 792

allows support for facilities that utilize independent

networks for Dante audio transport and equipment

management. In this way, “production” networks that

support transport of audio signals by way of a single

LAN (for Switched Dante) or two LANs (for Redundant

Dante) can be separate from an engineering network

that is used by technical personnel for conguring and

maintaining a facility or “plant.”

Connections to the three Ethernet interfaces are made

by way of standard RJ45 connectors (jacks) that are

located on the back of the Model 792’s enclosure. The

Ethernet interfaces support auto MDI/MDI-X so that

crossover cables are not required.

Refer to Appendix B for examples of how the Model

792’s three Ethernet interfaces might be utilized.

Dante Port Connections

At least one 1000BASE-T (GigE) Ethernet connec-

tion is required for Model 792 Dante operation. It

should be connected to the primary RJ45 jack. A

second 1000BASE-T connection can be made to the

secondary RJ45 jack if Redundant Dante is desired.

(For this functionality to be active the Model 792’s

network configuration must be set for Redundant

within the Dante Controller software application.)

While technically 100BASE-TX Ethernet can also be

used for these Dante connections, it is not optimal.

Additionally, it’s important to note that 10BASE-T

Ethernet connections are not su󰀩cient.

When congured in Dante Controller for the Switched

network mode the Model 792’s secondary Dante Eth-

ernet connection can also be used as a “loop through”

port such as would be provided by an Ethernet switch.

Switched mode is the default setting but using the

secondary Dante port in this manner for applications

other than troubleshooting or “looping” to access the

Model 792’s management port is not recommended.

It will function reliably but “daisy chaining” Ethernet

signals can limit exibility and present a failure point;

it’s optimal if each Dante Ethernet interface connects

directly to a separate port on an Ethernet switch.

Management Port Connection

An Ethernet signal is required to be interconnected

with the management port so that Model 792 con-

guration and management can be performed. It’s

recommended that a 1000BASE-T (GigE) connection

be made but a 100BASE-TX or even a 10BASE-T

connection is su󰀩cient. (GigE will provide the best

performance and it’s assumed that all contemporary

applications will support it.) The Model 792’s man-

agement port can share a network that is being used

by the unit’s one or two Dante network connections.

Refer to Appendix B for examples of how this can be

easily implemented.

Dante and Analog Audio

The Model 792 provides both Dante digital and ana-

log audio output signals. In most cases, the Analog

Surround Output channels will be configured for

Figure 4. Detail of Model 792 back panel showing the

Ethernet port’s RJ45 jacks

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